In one study, doctors measured the diets of 58,615 healthy Japanese men and women, aged 40 to 79, over a two-year period, and then followed up for 15 years.

Overall, compared to those who got the least magnesium in their diet, those who consumed the most magnesium were much less likely to have died from heart disease. This was particularly true for women, with those taking the most magnesium 36 percent less likely to have unhealthy hearts compared to women who got the least magnesium. Women who got the most magnesium were more likely to avoid dying from stroke, heart disease, heart failure, and all cardiovascular disease.

For men, compared to those who got the least magnesium, those who got the most magnesium were half as likely to have a stroke. These men were also about half as likely to have a blood clot in the brain, decreased blood flow to the heart, and heart failure—the reduced ability of the heart to pump blood.

Doctors concluded getting enough magnesium in the diet can help extend life by improving blood vessel and heart health.

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